Specification	DS1374C-3#T&R

Current - Timekeeping (Max)	125 µA
Date Format	Binary
Features	Square Wave Output, Trickle-Charger, Alarm, Watchdog Timer
Interface	I2C, 2-Wire Serial
Mounting Type	Surface Mount
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 C
Package / Case	16-SOIC
Package / Case	7.5 mm
Package / Case	0.295 "
Supplier Device Package	16-SOIC
Time Format	Binary
Type	Binary Counter
Voltage - Supply [Max]	3.3 V
Voltage - Supply [Min]	2.7 V
Voltage - Supply, Battery [Max]	3.7 V
Voltage - Supply, Battery [Min]	1.3 V

DS1374 Series

I²C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output

Part	Time Format	Operating Temperature [Max]	Operating Temperature [Min]	Features	Voltage - Supply [Min]	Voltage - Supply [Max]	Package / Case	Type	Supplier Device Package	Voltage - Supply, Battery [Max]	Voltage - Supply, Battery [Min]	Date Format	Current - Timekeeping (Max)	Mounting Type	Interface	Package / Case	Package / Case	Memory Size
Analog Devices Inc./Maxim Integrated DS1374U-33+	Binary	85 °C	-40 C	Alarm Square Wave Output Trickle-Charger Watchdog Timer	2.97 V	5.5 V	10-TFSOP 10-MSOP (0.118" 3.00mm Width)	Binary Counter	10-uMAX/uSOP	5.5 V	1.3 V	Binary	175 µA	Surface Mount	I2C 2-Wire Serial
Analog Devices Inc./Maxim Integrated DS1374C-3#T&R	Binary	85 °C	-40 C	Alarm Square Wave Output Trickle-Charger Watchdog Timer	2.7 V	3.3 V	16-SOIC	Binary Counter	16-SOIC	3.7 V	1.3 V	Binary	125 µA	Surface Mount	I2C 2-Wire Serial	7.5 mm	0.295 "
Analog Devices Inc./Maxim Integrated DS1374U-33	Binary	85 °C	-40 C	Alarm Square Wave Output Trickle-Charger Watchdog Timer	2.97 V	5.5 V	10-TFSOP 10-MSOP (0.118" 3.00mm Width)	Binary Counter	10-uMAX/uSOP	5.5 V	1.3 V	Binary	175 µA	Surface Mount	I2C 2-Wire Serial
Analog Devices Inc./Maxim Integrated DS1374U-33+T&R	Binary	85 °C	-40 C	Alarm Square Wave Output Trickle-Charger Watchdog Timer	2.97 V	5.5 V	10-TFSOP 10-MSOP (0.118" 3.00mm Width)	Binary Counter	10-uMAX/uSOP	5.5 V	1.3 V	Binary	175 µA	Surface Mount	I2C 2-Wire Serial
Analog Devices Inc./Maxim Integrated DS1374C-18#	Binary	85 °C	-40 C	Alarm Square Wave Output Trickle-Charger Watchdog Timer	1.71 V	1.89 V	16-SOIC	Binary Counter	16-SOIC	3.7 V	1.3 V	Binary	100 µA	Surface Mount	I2C 2-Wire Serial	7.5 mm	0.295 "
Analog Devices Inc./Maxim Integrated DS1374U-18	Binary	85 C	-40 ¯C	Alarm NVRAM Square Wave Output Trickle-Charger Watchdog Timer	1.71 V	1.89 V	10-TFSOP 10-MSOP (0.118" 3.00mm Width)	Binary Counter	10-uMAX	3.7 V	1.3 V	Binary	100 µA	Surface Mount	I2C 2-Wire Serial			3 B
Analog Devices Inc./Maxim Integrated DS1374U-3+T&R	Binary	85 °C	-40 C	Alarm Square Wave Output Trickle-Charger Watchdog Timer	2.7 V	3.3 V	10-TFSOP 10-MSOP (0.118" 3.00mm Width)	Binary Counter	10-uMAX/uSOP	3.7 V	1.3 V	Binary	125 µA	Surface Mount	I2C 2-Wire Serial
Analog Devices Inc./Maxim Integrated DS1374U-18+	Binary	85 °C	-40 C	Alarm Square Wave Output Trickle-Charger Watchdog Timer	1.71 V	1.89 V	10-TFSOP 10-MSOP (0.118" 3.00mm Width)	Binary Counter	10-uMAX/uSOP	3.7 V	1.3 V	Binary	100 µA	Surface Mount	I2C 2-Wire Serial
Analog Devices Inc./Maxim Integrated DS1374U-3+	Binary	85 °C	-40 C	Alarm Square Wave Output Trickle-Charger Watchdog Timer	2.7 V	3.3 V	10-TFSOP 10-MSOP (0.118" 3.00mm Width)	Binary Counter	10-uMAX/uSOP	3.7 V	1.3 V	Binary	125 µA	Surface Mount	I2C 2-Wire Serial

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$	Updated

Digikey	Tape & Reel (TR)	1000	$ 3.39	<4d
		2000	$ 3.25

Description

General part information

DS1374 Series

The DS1374 is a 32-bit binary counter designed to continuously count time in seconds. An additional counter generates a periodic alarm or serves as a watchdog timer. If disabled, this counter can be used as 3 bytes of nonvolatile (NV) RAM. Separate output pins are provided for an interrupt and a square wave at one of four selectable frequencies. A precision temperature-compensated reference and comparator circuit monitor the status of VCCto detect power failures, provide a reset output, and automatically switch to the backup supply when necessary.Additionally, the reset pin is monitored as a pushbutton input for externally generating a reset. The device is programmed serially through an I²C serial interface.ApplicationsMedical EquipmentPoint-of-Sale EquipmentPortable InstrumentationTelecommunications